Manufacture and examination of C/Si3N4 nanocomposites

C. Balázsi, F. S. Cinar, O. Addemir, F. Wéber, P. Arató

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

C/Si3N4 nanocomposites have been prepared through carbon black nanograins, graphite micrograins addition to silicon nitride starting powder. The role of excess oxygen was examined by oxidising the alpha silicon nitride starting powder. For nanocomposite processing sinter-HIP and hot press have been applied. Bending strength and elastic modulus have been found to be influenced by amount of carbon black and graphite introduced in silicon nitride matrix. In the case of HIP samples a desintering process was observed. During pressure-less sintering step the structure retained the α-Si3N4 phase, after second sintering step new phase(s) appeared. Hot pressed samples with a higher α-Si3N4 phase contribution showed considerable improvement of hardness.

Original languageEnglish
Pages (from-to)3287-3294
Number of pages8
JournalJournal of the European Ceramic Society
Volume24
Issue number12
DOIs
Publication statusPublished - 2004

Fingerprint

Silicon nitride
Nanocomposites
Hot isostatic pressing
Carbon black
Graphite
Sintering
Soot
Powders
Bending strength
Elastic moduli
Hardness
Oxygen
Processing
silicon nitride

Keywords

  • Nanocomposites
  • Porosity
  • SiN
  • Sintering
  • Strength

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Manufacture and examination of C/Si3N4 nanocomposites. / Balázsi, C.; Cinar, F. S.; Addemir, O.; Wéber, F.; Arató, P.

In: Journal of the European Ceramic Society, Vol. 24, No. 12, 2004, p. 3287-3294.

Research output: Contribution to journalArticle

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